#include <stdio.h>
int max(int x,int y){
	int z;
	if(x>y)z=x;
	else z=y;
	return z;
}
int main(){
	int a,b,c;
	scanf("%d,%d",&a,&b);
	c=max(a,b);
	printf("max=%d\n",c);
	return 0;
}